https://imgur.com/a/kBcNDeh

The use of bullet points reads and the "and" tacked onto the end of the first bullet point makes it unclear

The wording should be revised so it's more obvious that "onTransactionComplete" is to be sent to instances where the userID matches the userID that initiated.

Since the first bullet point is superflous, since the userID of the first bullet point is also matched by the second bullet point.